CN220213749U - Simultaneously multiple transformer fire pollution-free flash dry powder-nitrogen injection fire extinguishing combined system - Google Patents

Abstract

The utility model relates to a pollution-free flash powder-nitrogen injection fire extinguishing combined system for multiple transformer fires at the same time, which consists of 7 large components such as a dry powder fire extinguishing device A, a dry powder fire extinguishing pipe network B, a fire nitrogen injection fire extinguishing device C, a nitrogen injection fire extinguishing pipe network D, a transformer oil tank oil discharge pipeline E, a transformer oil pillow oil discharge pipeline F, a field fire extinguishing control cabinet G and the like. Under the condition that the fire extinguishing equipment and the occupied area are not increased much, the fire extinguishing effect of independently extinguishing one or more transformer fires is realized, the problem that the existing transformer fire extinguishing system cannot independently extinguish one or more transformer fires is solved at one time, the utility model can be suitable for various extreme environments, has great practical significance, outstanding social benefit, economic benefit and environmental benefit, and wide application prospect.

Description

Simultaneously multiple transformer fire pollution-free flash dry powder-nitrogen injection fire extinguishing combined system

Technical Field

The utility model relates to the technical field of fire-fighting equipment, in particular to an oil immersed power transformer fire extinguishing system, and in particular relates to a pollution-free flash powder-nitrogen injection fire extinguishing combined system for simultaneously utilizing a plurality of transformers.

Background

In recent years, as power equipment put into operation in the period of the peak of the last power construction in China sequentially enters an upgrading period, transformer accidents caused by equipment aging and loss tend to increase. Along with the continuous research and fire extinguishing test verification of the explosion and fire extinguishing of the transformer for many years, the existing latest 2022 converter transformer national standard latest external water or foam spray and foam gun fire extinguishing system still cannot effectively extinguish the internal fire of the oil tank, shelter from the fire and spread the fire.

By the end of 2022, although the improvement innovation of the traditional fire extinguishing system and fire alarm system solves the problems of fire extinction by shielding the fire re-combustion fire by the deep high-temperature oil layer in the transformer oil tank and fire extinction by spreading the fire outside the oil tank, the problem of fire extinction by shielding the fire outside the oil tank is solved, but some left-over problems still wait to be solved: 1) The fire disaster outside the oil tank adopts a water spray and foam spray fire extinguishing system, so that the problem of difficult use in the water-deficient freezing area is not completely solved yet; 2) The outside fire-shielding fire-extinguishing of the oil tank adopts water spraying and foam spraying fire-extinguishing system, and the problems of wind prevention, rain prevention, shielding, pipe network spray head explosion prevention and influence on transformer operation maintenance and overhaul are not solved yet. The fire extinguishing system is characterized in that the external water spray and foam spray fire extinguishing system is improved in wind prevention, rain prevention and shielding, and fire extinguishing pipelines and spray heads are required to be arranged near the explosion part of the transformer sleeve lifting seat beyond shielding objects such as a radiator, so that the problems of difficult implementation of spray head pipe network explosion prevention and influence on operation, maintenance and overhaul of a transformer are brought at the same time; 3) Experiments show that the windproof, rainproof and anti-shielding spray head of the dry powder fire extinguishing system can be arranged far away from explosion parts such as a transformer sleeve lifting seat, is more beneficial to the explosion prevention of a pipe network spray head and the operation, maintenance and overhaul of a transformer, and is suitable for being used in a severely water-deficient long-term freezing area in China, so that the dry powder fire extinguishing system is recommended to extinguish fire outside a transformer oil tank; however, dry powder fire suppression systems also have disadvantages: the national standard dry powder extinguishing system adopts a fire extinguishing mode of 60s of one-time spraying, and through landmark fire extinguishing test verification and expert review, although the total consumption of the dry powder extinguishing agent is adopted to be sprayed for four times (4 dry powder tanks), and the fire extinguishing mode of 15 seconds of each spraying is adopted, the pollution flashover problem of dust dispersion electric equipment can not be solved all the time, especially the re-burning fire after the area of the local re-burning fire is greatly reduced after the first fire extinguishing is extinguished, and if a transformer substation is in a humid area, the pollution flashover of other electric equipment is likely to be caused; 4) The existing test transformer fire extinguishing system does not solve the problem of simultaneous fire extinguishment of multiple transformers in extreme cases.

Aiming at the problems, the fire disaster situation of a plurality of transformers can be caused under the extreme conditions of explosion short-circuit current mutation, earthquake, war and the like of a single transformer, so that the independent fire extinguishing system for the fire disaster of the plurality of transformers is necessary to be developed without being influenced by the explosion of the transformers, without influencing the operation, maintenance and repair of the transformers, water shortage, freezing, heavy wind, heavy rain, humid environment conditions, various extreme environment conditions and normal use.

Disclosure of Invention

The utility model provides a pollution-free flash powder-nitrogen injection fire extinguishing combined system for simultaneously using a plurality of transformers in fire.

The specific technical scheme of the utility model is as follows:

a simultaneous multiple transformer fire pollution-free flash powder-nitrogen injection fire extinguishing combined system consists of large components of a dry powder fire extinguishing device, a dry powder fire extinguishing pipe network, a fire nitrogen injection fire extinguishing device, a nitrogen injection fire extinguishing pipe network, a transformer oil tank oil discharge pipeline, a transformer oil pillow oil discharge pipeline and a site fire extinguishing control cabinet 7 for the external fire of an oil tank;

the dry powder extinguishing agent outlet pipelines of the large-dose dry powder tank group, the medium-dose dry powder tank group and the small-dose dry powder tank group are respectively connected to a dry powder extinguishing collecting pipe, and the dry powder extinguishing collecting pipe is connected with a dry powder extinguishing pipe network;

the dry powder fire extinguishing pipe network component is connected with the outlet end of a dry powder fire extinguishing collecting pipe through one end of a fire extinguishing main pipe, the other end of the dry powder fire extinguishing pipe network component is connected with a partition selection valve, and then is connected to an electric injection control valve, a fixed or movable fire extinguishing branch pipe and a windproof, rainproof and anti-shielding dry powder nozzle through a partition communication pipe, wherein the fire extinguishing distribution pipe is additionally connected with a manual injection control valve and the windproof, rainproof and anti-shielding dry powder nozzle, and the partition selection valve is communicated with different transformer fire extinguishing pipe networks through partition communication;

the nitrogen fire-extinguishing cabinet of the fire nitrogen-injecting fire-extinguishing equipment assembly in the oil tank is arranged in a fire-extinguishing equipment room, a nitrogen fire-extinguishing bottle group is fixed on a bottle rack in the nitrogen fire-extinguishing cabinet, a starting bottle is fixed on a bottle body of the nitrogen fire-extinguishing bottle group, the starting bottle is connected with the nitrogen fire-extinguishing bottle group through a starting gas pipeline, an outlet pipeline of the nitrogen fire-extinguishing bottle group is connected to a nitrogen collecting pipeline, and an outlet of the nitrogen collecting pipeline is connected with a nitrogen-injecting fire-extinguishing pipe network assembly;

the nitrogen injection fire extinguishing pipe network component is connected with a fire nitrogen injection fire extinguishing equipment component in the oil tank through one end of a nitrogen injection fire extinguishing main pipeline, and the other end of the nitrogen injection fire extinguishing pipe network component is connected with a nitrogen injection interface valve at the lower part of the transformer oil tank, and the nitrogen injection fire extinguishing pipe network component passes through a nitrogen injection fire extinguishing main pipeline compensator, a nitrogen injection fire extinguishing selection valve, an automatic docking locking device of the nitrogen injection fire extinguishing pipeline, an anti-misoperation nitrogen fire extinguishing control valve, a nitrogen injection fire extinguishing pipeline compensator, a nitrogen exhaust component, a nitrogen diversion component, a nitrogen injection fire extinguishing distribution pipe and a nitrogen injection fire extinguishing branch pipe;

the oil discharge pipeline assembly of the transformer oil tank is formed by sequentially connecting an oil discharge interface valve, an oil discharge pipeline exhaust assembly, an anti-misoperation oil discharge selection valve, an oil discharge valve leakage inspection port and an oil discharge pipeline I; one end of the oil discharge pipeline of the transformer oil tank is connected with an oil discharge interface valve arranged at the upper part of the transformer oil tank, and the other end of the oil discharge pipeline is led into a pebble of an oil storage pool of the transformer for discharging oil; the leakage inspection port of the oil drain valve is arranged at the position of about 1.5m of the height of the oil drain pipe I;

the transformer oil conservator oil discharge pipeline assembly is formed by sequentially connecting an oil conservator oil discharge pipeline, an oil conservator oil discharge control valve, an oil drain pipe leakage overhaul port and an oil drain pipe II, one end of the oil conservator oil discharge pipeline is led out from between a transformer oil conservator and a transformer oil tank connecting pipe, the other end of the oil conservator oil discharge pipeline is directly connected under a pebble of a transformer oil storage tank, the oil drain pipe leakage overhaul port is provided with the oil drain pipe II with a height of about 1.5m, and a pipeline joint led out by the oil conservator oil discharge pipeline is positioned between a transformer oil conservator stop valve and an oil conservator bottom valve;

the on-site fire extinguishing control cabinet component consists of a manual start button, an emergency stop button and a dry powder spray nozzle electromagnetic valve control button; the manual starting button and the emergency stopping button are used for manually starting and stopping the dry powder-nitrogen injection fire extinguishing combined system in an emergency mode, and the dry powder spray nozzle electromagnetic valve control button is used for manually starting and stopping the dry powder spray nozzle electromagnetic valve in an emergency mode; the on-site fire-extinguishing control cabinet component can also provide power for the electromagnetic valve of the spray head, the matched on-site audible and visual alarm box of fire alarm and the display lamp of the jet indicator lamp.

Further, preferably, the optimal pollution-free flash fire extinguishing equipment configuration scheme of the single transformer fire of the system is that a 2-group large-dose dry powder tank group, a 2-group medium-dose dry powder tank group, a 4-group small-dose dry powder tank group and a 2-nitrogen fire extinguishing bottle group; the optimal pollution-free flashover fire extinguishing equipment configuration scheme of 2 transformer fires of the system is that 2 nitrogen fire extinguishing bottle groups are added on the basis of the optimal pollution-free flashover fire extinguishing equipment configuration scheme of a single transformer fire; the optimal pollution-free flash fire extinguishing equipment configuration scheme of 3 to a plurality of transformer fires of the system is that 1 is added every time, and 1 group of large-dose dry powder tank groups, 1 group of medium-dose dry powder tank groups, 2 groups of small-dose dry powder tank groups and 2 nitrogen fire extinguishing bottle groups are added on the basis of the optimal pollution-free flash fire extinguishing equipment configuration scheme of a single transformer fire.

Further, it is preferred that the 4 sets of small dose dry powder canister sets may be divided into 2 sets of small dose dry powder canister sets + one-half of 2 sets of small dose dry powder canister sets.

Further, it is preferable that a single transformer of the system severely explodes a large-area fire and is provided with at least 1 group of large-dose dry powder tank groups, 1 group of medium-dose dry powder tank groups, 2 groups of small-dose dry powder tank groups and 2 nitrogen fire extinguishing bottle groups; the medium-explosion medium-area fire disaster in a single transformer of the system is at least matched with 1 group of medium-dose dry powder tank groups, 2 groups of small-dose dry powder tank groups and 2 nitrogen fire extinguishing bottle groups; a single transformer of the system slightly explodes a small-area fire disaster, and at least 2 groups of small-dose dry powder tank groups and 2 nitrogen fire extinguishing bottle groups are configured.

Further, it is preferable that the length of the main fire extinguishing pipe is not more than 80 m.

Further, preferably, the installation height of the windproof, rainproof and shielding-proof dry powder nozzle at the top of the oil tank is within 3m above the outer side of the transformer oil tank, and the windproof, rainproof and shielding-proof dry powder nozzle at the bottom of the oil tank is installed at two ends of the long side of the transformer oil tank.

Further, it is preferable that the system is provided with an explosion-proof device and an oil-blocking and discharging device for explosion of transformers with different appearance structures; the explosion-proof device comprises a side surface and top surface sleeve explosion pipe network explosion-proof device, is arranged between the transformer body and the transformer fire extinguishing system pipe network and is close to one side of the fire extinguishing system pipe network and used for guaranteeing that an explosion component damages the transformer fire extinguishing system pipe network and a spray head after the transformer sleeve is exploded, and the explosion-proof device also comprises a side surface and top surface sleeve lifting seat explosion-proof device which is arranged close to the transformer sleeve lifting seat and used for guaranteeing that a pipeline spray head of the internal and external fire extinguishing system of the transformer is not damaged by the explosion component of the transformer sleeve lifting seat; the oil blocking and discharging device is arranged on the outer side of a pipe network of the fire extinguishing system of the transformer in a clinging manner, the oil blocking device is used for ensuring that the explosion flow of the transformer does not exceed the protection range of the fire extinguishing system, and the oil discharging device is used for rapidly discharging the transformer oil to convert the fire spread outside a large-oil-quantity high-strength oil tank exceeding the protection range of the fire extinguishing system into a fire spread outside a small-range small-oil-quantity low-strength oil tank.

The beneficial effects of the utility model are as follows:

(1) According to the utility model, the deep high-temperature oil layer cooling and covering fire extinguishing and fire surface covering and air isolation fire extinguishing in the oil tank can be effectively realized through the oil discharging and nitrogen injecting fire extinguishing mechanism, meanwhile, the nitrogen injecting fire extinguishing system in the oil tank is not influenced by extreme factors such as shielding of an external valve hall firewall and a converter transformer oil tank, water shortage freezing, wind and rain and the like, and the fire extinguishing of the fire re-burning in the oil tank can be rapidly completed within 10 minutes.

(2) According to the utility model, by arranging the explosion-proof device and the oil blocking and discharging device, on one hand, the explosion damage of the transformer to the fire extinguishing system pipe network is avoided, and on the other hand, the external spreading fire re-burning fire which is large in oil quantity, large in area and beyond the protection range can be converted into the low-oil quantity, small in area and within the range of the high-temperature fire of the oil basin fire surface layer which can be extinguished by the transformer fire extinguishing system, so that the extinguishment of the external flowing fire shielding fire spreading fire re-burning fire of the transformer oil tank is completed.

(3) The utility model provides a dry powder extinguishing dose preparation scheme for severe, moderate and slight explosion fires of transformers, and effectively reduces pollution flashover of dust dispersion electric equipment of a dry powder system.

(4) According to the utility model, under the condition that the fire extinguishing equipment is only added with 2 nitrogen cylinder groups and the occupied area is unchanged, the fire extinguishing effect of one set of fire extinguishing equipment for independently extinguishing 1-2 transformer fires is realized; under the condition that the fire extinguishing equipment and the occupied area are not increased much, the fire extinguishing effect that one set of fire extinguishing equipment can independently extinguish one or more transformer fires simultaneously is realized, and the problem that the existing transformer fire extinguishing system cannot independently extinguish one or more transformer fires is solved at one time.

(5) The utility model can be suitable for being used in extreme environments such as severe water shortage, long-term freezing, various transformer explosions, outdoor strong wind and heavy rain environments, weak fire rescue force in remote areas, traffic blocking of geological disasters such as earthquake debris flow and the like, station power interruption total station voltage loss, single or multiple transformer fires in converter stations or substations, earthquake or war time single or multiple transformer fires, severe environment protection areas and the like, and realizes the full-process, full automation, independence and 10-minute rapid environment-friendly fire extinguishing of multiple simultaneous transformer fires without depending on fire departments.

(6) The utility model can reduce fire loss and environmental pollution, has great practical significance, outstanding social benefit, economic benefit and environmental benefit and wide application prospect.

Drawings

FIG. 1 is a diagram showing the construction of a dry powder-nitrogen injection fire extinguishing combined system for a transformer fire disaster at the same time;

FIG. 2 is a diagram showing the construction of a dry powder-nitrogen injection fire extinguishing combined system for two simultaneous transformers according to the present utility model;

FIG. 3 is a diagram showing the construction of a dry powder-nitrogen injection fire extinguishing combined system for three simultaneous transformers according to the present utility model;

FIG. 4 is a schematic view of the fire nitrogen injection fire suppression apparatus of the present utility model inside a tank;

FIG. 5-1 is a schematic diagram of a side (left view) and top (right view) sleeve explosion pipe network explosion protection device;

FIG. 5-2 is a schematic illustration of an explosion-proof apparatus for a pipe network with elevated seats for side (right) and top (left) bushings;

FIG. 6 is a schematic view of an oil baffle drain;

FIG. 7 is a schematic diagram of a fire location alarm positioning and external environment monitoring device;

FIG. 8 is a fire suppression control flow chart of the present utility model;

in the figure: the fire extinguishing system comprises A-oil tank external fire dry powder extinguishing equipment, B-dry powder extinguishing pipe network, C-oil tank internal fire nitrogen injection extinguishing equipment, D-nitrogen injection extinguishing pipe network, E-transformer oil tank oil discharge pipeline, F-transformer oil pillow oil discharge pipeline and G-site fire extinguishing control cabinet; a1-a large-dose dry powder tank set, A2-a medium-dose dry powder tank set, A3-a small-dose dry powder tank set and A4-a dry powder fire extinguishing collecting pipe; the fire extinguishing system comprises a B1-fire extinguishing main pipe, a B2-partition selection valve, a B3-partition communication pipe, a B4-dry powder fire extinguishing pipeline distribution valve, a B5-fire extinguishing distribution pipe, a B6-electric injection control valve, a B7-fixed or movable fire extinguishing branch pipe, a B8-manual injection control valve and a B9-windproof, rainproof and shielding dry powder nozzle; c1-starting bottle, C2-starting gas pipeline, C3-nitrogen fire-extinguishing bottle group, C4-nitrogen collecting pipeline and C5-nitrogen fire-extinguishing cabinet; the device comprises a D1-nitrogen fire extinguishing main pipeline, a D2-nitrogen injection fire extinguishing main pipe compensator, a D3-nitrogen fire extinguishing selection valve, an automatic butt locking device for a D4-nitrogen injection fire extinguishing pipeline, a D5-malfunction prevention nitrogen fire extinguishing control valve, a D6-nitrogen injection fire extinguishing pipeline compensator, a D7-nitrogen gas exhaust component, a D8-nitrogen gas distribution component, a D9-nitrogen injection fire extinguishing distribution pipe, a D10-nitrogen injection fire extinguishing branch pipe and a D11-nitrogen injection interface valve; e1-oil discharge interface valve, E2-oil discharge pipe exhaust component, E3-false operation prevention oil discharge selection valve, E4-oil discharge valve leakage inspection port and E5-oil discharge pipe I; f1-oil conservator oil discharge pipeline, F2-oil conservator oil discharge control valve, F3-oil discharge pipe leakage overhaul port and F4-oil discharge pipe II; g1-a manual start button, G2-an emergency stop button and G3-a solenoid valve control button of the dry powder spray head;

1-national standard infrared and ultraviolet fire alarm detector, 2-infrared temperature detector (or infrared spot thermometer), 3-fire image detector, 4-wind speed and rainfall environment monitoring device.

Detailed Description

In order to make the technical problems and technical schemes solved by the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

1-4, the combined system for simultaneously carrying out pollution-free flash powder and nitrogen injection fire extinguishment on a plurality of transformer fires can be used for carrying out the fire extinguishment on 1, 2 and 3 or more transformer fires, and simultaneously comprises a large assembly of pollution-free flash powder fire extinguishment equipment A, a dry powder fire extinguishment pipe network B, fire nitrogen injection fire extinguishment equipment C, a nitrogen injection fire extinguishment pipe network D, a transformer oil tank oil discharge pipeline E, a transformer oil pillow oil discharge pipeline F and a field fire extinguishment control cabinet G7 on the outside of an oil tank; the fire nitrogen injection fire extinguishing equipment C, the nitrogen injection fire extinguishing pipe network D, the transformer oil tank oil discharge pipeline E, the transformer oil pillow oil discharge pipeline F, the on-site fire extinguishing control cabinet G and the like in the oil tank of the system are general malfunction prevention and rejection prevention components, and the most concise nitrogen fire extinguishing system component (see figure 4) for removing malfunction components of all national standard oil discharge and nitrogen injection fire extinguishing devices is adopted by the fire nitrogen injection fire extinguishing equipment C in the oil tank; the nitrogen injection fire extinguishing pipe network D component is provided with an automatic butt joint locking device D4 of a nitrogen injection fire extinguishing pipe, and is automatically in butt joint when in normal times disconnected and extinguished, so that production accidents caused by transmission of malfunction faults of the nitrogen injection pipe to a transformer are prevented; the oil discharge pipeline E of the transformer oil tank is directly discharged to the transformer oil tank nearby, so that an oil discharge-nitrogen injection interlocking valve of a national standard oil discharge and nitrogen injection fire extinguishing device is eliminated, and misoperation and refusal of interlocking of the oil discharge-nitrogen injection pipeline are reduced; the oil drainage pipeline F of the transformer oil conservator is provided with an oil drainage pipeline from the oil conservator to the transformer oil tank, so that the problem that the secondary explosion danger of the oil conservator possibly caused after oil is poured on fire is solved when the oil conservator of the national standard oil drainage and nitrogen injection fire extinguishing device is provided with a stop valve; the on-site fire-extinguishing control cabinet G is a conventional part of a fire-extinguishing system, and is provided with an emergency start-stop button of an electric valve of a manual fire-extinguishing and spray nozzle, so that false operation due to refusal is avoided;

the dry powder extinguishing equipment A assembly for pollution-free flash powder of the fire outside the oil tank consists of a large-dose dry powder tank group A1, a medium-dose dry powder tank group A2 and a small-dose dry powder tank group A3 which are fixedly arranged on the basis of an extinguishing equipment room in sequence, wherein dry powder extinguishing agent outlet pipelines of the large-dose dry powder tank group A1, the medium-dose dry powder tank group A2 and the small-dose dry powder tank group A3 are respectively connected to a dry powder extinguishing collecting pipe A4, and the dry powder extinguishing collecting pipe A4 is connected with a dry powder extinguishing pipe network B;

the dry powder fire extinguishing pipe network B component is connected with the outlet end of a dry powder fire extinguishing collecting pipe A4 through one end of a fire extinguishing main pipe B1, the other end of the dry powder fire extinguishing pipe network B component is connected with a partition selection valve B2, the dry powder fire extinguishing pipe network B component is connected with an electric injection control valve B6, a fixed or movable fire extinguishing branch pipe B7 and a wind-proof, rain-proof and shielding dry powder nozzle B9 through a partition communication pipe B3, the wind-proof, rain-proof and shielding dry powder nozzle B9 at the top of the oil tank is arranged within 3m above the outer side of a transformer oil tank, the wind-proof, rain-proof and shielding dry powder nozzle B9 at the bottom of the oil tank is arranged at the two ends of the long side of a transformer oil tank, the nozzles and the fire extinguishing effect of different manufacturers are required to be verified through a transformer fire simulation test under actual appearance conditions, and the installation height, the installation angle, the protection range and the like of the wind-proof, rain-proof and shielding dry powder nozzle B9 are determined;

the nitrogen fire-extinguishing cabinet C5 of the nitrogen fire-extinguishing equipment C component for fire disaster in the oil tank is arranged in a fire-extinguishing equipment room, a nitrogen fire-extinguishing bottle group C3 is fixed on a bottle rack in the nitrogen fire-extinguishing cabinet C5, a starting bottle C1 is fixed on a bottle body of the nitrogen fire-extinguishing bottle group C3, the starting bottle C1 is connected with the nitrogen fire-extinguishing bottle group C3 through a starting gas pipeline C2, an outlet pipeline of the nitrogen fire-extinguishing bottle group C3 is connected to a nitrogen collecting pipeline C4, and an outlet of the nitrogen collecting pipeline C4 is connected with a nitrogen-injecting fire-extinguishing pipe network D component;

one end of the nitrogen injection fire extinguishing pipe network D component is connected with a fire nitrogen injection fire extinguishing equipment C component in the oil tank through a nitrogen injection fire extinguishing main pipeline D1, and the other end of the nitrogen injection fire extinguishing pipe network D component is connected with a nitrogen injection interface valve D11 at the lower part of the transformer oil tank, and the nitrogen injection fire extinguishing pipe network D component passes through a nitrogen injection fire extinguishing main pipe compensator D2, a nitrogen injection fire extinguishing selection valve D3, a nitrogen injection fire extinguishing pipeline automatic butt joint locking device D4, an anti-misoperation nitrogen fire extinguishing control valve D5, a nitrogen injection fire extinguishing pipeline compensator D6, a nitrogen gas exhaust component D7, a nitrogen gas diversion component D8, a nitrogen injection fire extinguishing distribution pipe D9 and a nitrogen injection fire extinguishing branch pipe D10;

the oil discharge pipeline E assembly of the transformer oil tank is formed by sequentially connecting an oil discharge interface valve E1, an oil discharge pipeline exhaust assembly E2, an anti-misoperation oil discharge selection valve E3, an oil discharge valve leakage inspection port E4 and an oil discharge pipeline I E5; one end of the oil discharge pipeline E of the transformer oil tank is connected with an oil discharge interface valve E1 arranged at the upper part of the transformer oil tank, and the other end of the oil discharge pipeline E is led to a pebble entering the oil storage pool of the transformer for discharging oil; the leakage inspection opening E4 of the oil drain valve is arranged at the position of about 1.5m of the height of the oil drain pipe IE 5;

the transformer oil conservator oil discharge pipeline F assembly is formed by sequentially connecting an oil conservator oil discharge pipeline F1, an oil conservator oil discharge control valve F2, an oil drain pipe leakage overhaul port F3 and an oil drain pipe II F4, wherein one end of the oil conservator oil discharge pipeline F is led out from between a transformer oil conservator and a transformer oil tank connecting pipe, the other end of the oil conservator oil discharge pipeline F is directly connected under a pebble of a transformer oil storage tank, the oil drain pipe leakage overhaul port F3 is provided with the oil drain pipe II F4 with the height of about 1.5m, and a pipeline interface led out by the oil conservator oil discharge pipeline F is positioned between a transformer oil conservator stop valve and an oil conservator bottom valve;

the on-site fire extinguishing control cabinet G component consists of a manual starting button G1, an emergency stopping button G2 and a dry powder spray nozzle electromagnetic valve control button G3; the manual starting button G1 and the emergency stopping button G2 are used for starting and stopping the dry powder-nitrogen injection fire extinguishing combined system in an emergency mode, and the dry powder spray nozzle electromagnetic valve control button G3 is used for starting and stopping the electromagnetic valve of the dry powder spray nozzle in an emergency mode; the on-site fire-extinguishing control cabinet G component can also provide power for the electromagnetic valve of the spray head, the matched on-site audible and visual alarm box of fire alarm and the display lamp of the jet indicator lamp.

The fire cases are determined by fire extinguishing test researches as follows:

the fire extinguishing scheme of the pollution-free flash dry powder fire extinguishing system comprises the following steps: firstly, determining the dosage of a dry powder tank group outside an oil tank according to the size of fire, and extinguishing most of external fire, wherein the fire position of an explosion point is disclosed; secondly, nitrogen is injected into the oil tank to extinguish the fire, the nitrogen-nitrogen injection extinguishing agent is fully mixed with combustible materials in ten minutes, the high-temperature oil layer in the oil tank is deeply stirred and cooled, the generation of combustible explosive gas is restrained, the surface layer in the oil tank is continuously covered with insulating air to extinguish the fire for more than 30 minutes, and the secondary combustion fire in the oil tank of the transformer is thoroughly extinguished to shield the fire; thirdly, the secondary extinguishment of the local re-burning fire hidden fire outside the missed oil tank is affected by wind and rain, and the dry powder is sprayed to extinguish the fire by intelligently selecting a small dry powder tank with corresponding dosage according to the fire area, so that the dispersion of the dry powder is reduced to the maximum extent; after the configuration of the optimized fire extinguishing system of the explosion-proof oil blocking and discharging facility, the external 15-second dry powder fire extinguishment of the general oil tank and the internal 10-minute continuous nitrogen injection fire extinguishment of the primary oil tank can ensure the extinguishment of the external fire of the medium-lower explosion of the transformer, and the external 15-second dry powder fire extinguishment of the oil tank and the internal 10-minute continuous nitrogen injection fire extinguishment of the primary oil tank can ensure the extinguishment of the external fire of the serious explosion of the transformer.

Specific embodiment configuration scheme:

as shown in fig. 1: the optimal pollution-free flash fire extinguishing equipment for single transformer fire disaster is configured by A2-group large-dose dry powder tank group A1+2-group medium-dose dry powder tank group A2+4-group small-dose dry powder tank group A3+2 nitrogen fire extinguishing bottle group C3; the 4 groups of small-dose dry powder tank groups A3 can be classified into 2 groups of small-dose dry powder tank groups A3 which are 2 times and one half of the small-dose dry powder tank groups A3 so as to meet the four fire extinguishing demands of severe, moderate and slight explosion fires of the transformer, namely pollution-free flashover fire, fire extinguishing requirements of the external flashover fires of the transformer, and along with the gradual reduction of fire areas of all or partial fires of secondary, tertiary and four fire extinguishing with the weather hidden fires of the external flashover fires of the transformer, at least 1 group of large-dose dry powder tank groups A1 and 1 group of large-dose dry powder tank groups A2 and 2 groups of small-dose dry powder tank groups A3 are configured for the severe explosion and large-area fires of the single transformer (the pollution-free flashover extinguishing of the external 4-time flashover fires of the oil tank is guaranteed); the medium-area fire disaster caused by medium explosion of a single transformer is at least matched with 1 group of medium-dose dry powder tank groups A2+2 groups of small-dose dry powder tank groups A3 (ensuring that the outside 3 times of re-burning fires of the oil tank do not have pollution flashover to extinguish the fire) +2 nitrogen fire extinguishing bottle groups C3; the single transformer slightly explodes the small-area fire and is at least provided with 2 groups of small-dose dry powder tank groups A3 (ensuring that 2 secondary fires outside the oil tank do not have pollution flashovers for extinguishment) +2 nitrogen fire extinguishing bottle groups C3.

As shown in fig. 2 and 3: meanwhile, the configuration scheme of the optimal pollution-free flashover fire extinguishing equipment for 2 transformer fires is that 2 nitrogen fire extinguishing bottle groups C3 are added on the basis of the configuration scheme of the optimal pollution-free flashover fire extinguishing equipment for single transformer fires; meanwhile, the optimal pollution-free flash fire extinguishing equipment configuration scheme of 3 to a plurality of transformer fires is that 1 transformer fire is added, and 1 group of large-dose dry powder tank groups A1, 1 group of small-dose dry powder tank groups A2, 2 groups of small-dose dry powder tank groups A3 and 2 nitrogen fire extinguishing bottle groups C3 are added on the basis of the optimal pollution-free flash fire extinguishing equipment configuration scheme of a single transformer fire; the main fire extinguishing pipes of the transformer dry powder fire extinguishing systems are mutually communicated through a partition selection valve B2 and a partition communication pipe B3 for standby; considering traffic conditions, in the area where no pollution-free flash dry powder-nitrogen injection fire extinguishing combined system extinguishing agent can be supplemented within 24 hours, in order to ensure the fire extinguishing reliability of the external fire of a plurality of transformer oil tanks, 1 large +1 medium +2 small dry powder tanks can be additionally added for standby in every 2-3 transformers. In addition, the fire extinguishing modes of the large-area fire disaster severely exploded by each transformer, the medium-area fire disaster moderately exploded and the small-area fire disaster slightly exploded are the same as those of the single transformer.

As shown in fig. 5-1, 5-2, and fig. 6: the combined system of pollution-free flash powder and nitrogen injection and fire extinguishment for the multiple transformers is independently provided with an explosion-proof device and an oil blocking and discharging device for the transformers with different appearance structures, and the explosion-proof and oil blocking and discharging device basically does not play a role in medium and slight explosion fires of the transformers, but plays a role in severe explosion fires of the transformers. The explosion-proof device comprises a side surface and top surface sleeve explosion pipe network explosion-proof device (see fig. 5-1), wherein the side surface and top surface sleeve explosion pipe network explosion-proof device is arranged between the transformer body and the transformer fire extinguishing system pipe network and is close to one side of the fire extinguishing system pipe network, and is used for ensuring that explosion components such as a porcelain sleeve, a conservator, a guide rod, a equalizing ring and the like damage the transformer fire extinguishing system pipe network and a spray head after the explosion of the transformer sleeve and preventing personnel injury; the explosion-proof device also comprises a side surface and top surface sleeve lifting seat explosion-proof device (see fig. 5-2), wherein the side surface and top surface sleeve lifting seat explosion-proof device is arranged close to the transformer sleeve lifting seat and is used for ensuring that a pipeline nozzle of the internal and external fire extinguishing system of the transformer is not damaged and failed by an explosion component of the transformer sleeve lifting seat; the oil blocking and discharging device is closely attached to the outer side (the side far away from the transformer body) of a transformer fire extinguishing system pipe network, the oil blocking device is used for ensuring that the explosion flow transformer oil of the transformer does not exceed the protection range of the fire extinguishing system, the oil discharging device is newly added with an oil discharging ramp and an accident oil pit oil discharging hole, and the existing accident oil discharging system is used for rapidly discharging transformer oil to convert the external spreading fire of a large-oil-quantity high-strength oil tank exceeding the protection range of the fire extinguishing system into the external fire of a small-range small-oil-quantity low-strength oil tank; when the explosion-proof and oil-blocking and oil-discharging device is implemented, the fire extinguishing effect of the fire extinguishing system cannot be affected, and the transformer is operated, maintained and overhauled.

As shown in fig. 7 and 8: the pollution-free flash powder-nitrogen injection fire extinguishing combined system for simultaneously realizing a plurality of transformer fires is provided with a matched fire alarm system and a fire extinguishing linkage control system; the fire alarm system has the function of re-burning internal and external fire alarm and has a national standard conventional infrared and ultraviolet dual-band fire detector for re-burning internal and external fire alarm; the fire extinguishing linkage control system also has a unique fire part positioning fixed point quantitative fire extinguishing control program, and a fire extinguishing control capability of a plurality of transformers at the same time, and a fire extinguishing logic control program of internal and external fires of the plurality of transformers after combustion at the same time; the fire position positioning can accurately position by means of the fire position temperature detector and the fire image detector to acquire fire area, flame temperature and fire intensity, the fire position fixed-point quantitative fire extinguishing program analyzes the fire position flame temperature by means of the temperature detector, and utilizes the fire image detector to analyze the optical characteristics, shape, jumping frequency and variation trend of the fire flame, and the intelligent flame image analysis capability of a fire image detector neural network, fuzzy mathematics, computational semantics and the like, so as to intelligently identify the fire intensity, avoid the interference of various environmental background factors, synthesize fire information such as fire extinguishing area, flame temperature, fire intensity and the like, intelligently judge and select large, medium and small dose dry powder tanks with corresponding doses, control the fire position fire area range spray head to perform fixed-point quantitative fire extinguishing, reduce dust diffusion and prevent pollution flashover of electrical equipment; simultaneously, the fire extinguishment control capability of a plurality of transformers is as follows: the fire disaster information of a plurality of transformers can be displayed simultaneously, and corresponding fire extinguishing equipment of the fire extinguishing system of the plurality of transformers can be controlled to extinguish fire; meanwhile, the internal and external fire extinguishment logic control program for the multiple transformers is that: the method comprises the steps of generating fire of one or more transformers, enabling the infrared and ultraviolet dual-band fire detectors of the one or more transformers to act, enabling the fire alarm linkage controller of the transformer to display fire conditions of the transformers and send alarm signals to the on-site audible and visual alarm box, enabling the one or more transformers to start a fire part to accurately position, quantifying fire extinguishing agents and logically starting a signal monitoring device working program, displaying temperature values of the fire parts of the plurality of transformers, enabling fire detection images to manually or automatically position the fire parts, simultaneously displaying wind speed and rain values of a transformer site, tripping signals of three-side circuit breakers of the plurality of main transformers, and enabling the fire positioning back to simultaneously meet starting conditions of tripping signals of the wind speed and rain quantity and the three-side circuit breakers, and enabling the plurality of transformers to reburning internal and external fire extinguishing control programs; the method comprises the steps that after fire positioning, wind speed and rainfall + three-side breaker tripping signal starting conditions cannot be met at the same time, if the condition is met, repeatedly detecting and waiting for starting the starting conditions to be met, starting a fire extinguishing control program for internal and external fires of the reburning fire, automatically starting a local or comprehensive fire part fire extinguishing system by using an external fire, spraying and extinguishing by using a spray nozzle of a fire extinguishing system, purging a pipe network, directly starting an oil and nitrogen discharging fire extinguishing system to extinguish the internal reburning fire after a plurality of transformer fires are extinguished by using the external fire, judging that the oil and nitrogen discharging system is started to extinguish the fire after the transformer fires are extinguished by using the manual mode, resetting the fire extinguishing system for the internal and external fires of the primary transformer, printing fire extinguishing information, and if the reburning fire occurs, repeating fire alarming, fire positioning, starting condition judgment, starting the fire extinguishing system resetting, and controlling the whole process of printing fire extinguishing information to extinguish the reburning fire until the fire extinguishing is finished, and directly ending the fire extinguishing if the reburning fire does not occur;

meanwhile, in the internal and external fire extinguishing logic control program of the transformers, when the internal fire of the heating oil tank at the outer side of the oil tank affects the cooling and extinguishing effects of the nitrogen injection extinguishing system in the oil tank, the external dry powder system is preferentially started to extinguish the heating of the bottom at the outer side of the oil tank; in the multi-transformer reburning fire extinguishing logic control program, when the wind speed and the starting conditions of the tripping signals of the three-side circuit breakers cannot be met at the same time after the long-time fire is positioned, the oil discharging and nitrogen injecting fire extinguishing system is started preferentially to extinguish the internal fire and reburning fire.

While the utility model has been described in detail in connection with specific and preferred embodiments, it will be understood by those skilled in the art that the utility model is not limited to the foregoing embodiments, but is intended to cover modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (7)

1. The system is characterized by comprising 7 large components of a pollution-free flash powder fire extinguishing device (A), a dry powder fire extinguishing pipe network (B), a fire nitrogen injection fire extinguishing device (C), a nitrogen injection fire extinguishing pipe network (D), a transformer oil tank oil discharge pipeline (E), a transformer oil pillow oil discharge pipeline (F) and a field fire extinguishing control cabinet (G) for the external fire of the oil tank;

the dry powder extinguishing device (A) assembly for the pollution-free flash powder of the fire outside the oil tank consists of a large-dose dry powder tank group (A1), a medium-dose dry powder tank group (A2) and a small-dose dry powder tank group (A3) which are fixedly arranged on the basis of a fire extinguishing device room in sequence, wherein dry powder extinguishing agent outlet pipelines of the large-dose dry powder tank group (A1), the medium-dose dry powder tank group (A2) and the small-dose dry powder tank group (A3) are respectively connected to a dry powder extinguishing collecting pipe (A4), and the dry powder extinguishing collecting pipe (A4) is connected with a dry powder extinguishing pipe network (B);

the system is characterized in that one end of a dry powder fire extinguishing pipe network (B) component is connected with the outlet end of a dry powder fire extinguishing collecting pipe (A4) through a fire extinguishing main pipe (B1), the other end of the dry powder fire extinguishing pipe network component is connected with a partition selection valve (B2), and then the dry powder fire extinguishing pipe network component passes through a partition communication pipe (B3), a dry powder fire extinguishing pipe network distribution valve (B4) and a fire extinguishing distribution pipe (B5) and is connected to an electric injection control valve (B6), a fixed or movable fire extinguishing branch pipe (B7) and a windproof, rainproof and shielding dry powder prevention nozzle (B9), the fire extinguishing distribution pipe (B5) is additionally connected with a manual injection control valve (B8) and the windproof, rainproof and shielding dry powder prevention nozzle (B9), and the partition selection valve (B2) is communicated with different transformer fire extinguishing pipe networks through the partition communication pipe (B3);

the nitrogen fire extinguishing cabinet (C5) of the fire nitrogen injection fire extinguishing equipment (C) component in the oil tank is arranged in a fire extinguishing equipment room, a nitrogen fire extinguishing bottle group (C3) is fixed on a bottle rack in the nitrogen fire extinguishing cabinet (C5), a starting bottle (C1) is fixed on a bottle body of the nitrogen fire extinguishing bottle group (C3), the starting bottle (C1) is connected with the nitrogen fire extinguishing bottle group (C3) through a starting gas pipeline (C2), an outlet pipeline of the nitrogen fire extinguishing bottle group (C3) is connected to a nitrogen collecting pipeline (C4), and an outlet of the nitrogen collecting pipeline (C4) is connected with the nitrogen injection fire extinguishing pipe network (D) component;

the nitrogen injection fire extinguishing pipe network (D) component is connected with a fire nitrogen injection fire extinguishing equipment (C) component in the oil tank through one end of a nitrogen fire extinguishing main pipeline (D1), the other end of the nitrogen injection fire extinguishing pipe network (D1) is connected with a nitrogen injection interface valve (D11) at the lower part of the transformer oil tank, and the nitrogen injection fire extinguishing pipe network passes through a nitrogen injection fire extinguishing main pipe compensator (D2), a nitrogen fire extinguishing selection valve (D3), an automatic butt joint locking device (D4) of the nitrogen injection fire extinguishing pipeline, an anti-misoperation nitrogen fire extinguishing control valve (D5), a nitrogen injection fire extinguishing pipeline compensator (D6), a nitrogen exhaust component (D7), a nitrogen gas diversion component (D8), a nitrogen injection fire extinguishing distribution pipe (D9) and a nitrogen injection fire extinguishing branch pipe (D10);

the oil discharge pipeline (E) component of the transformer oil tank is formed by sequentially connecting an oil discharge interface valve (E1), an oil discharge pipeline exhaust component (E2), an anti-misoperation oil discharge selection valve (E3), an oil discharge valve leakage inspection port (E4) and an oil discharge pipeline I (E5); one end of the oil discharge pipeline (E) of the transformer oil tank is connected with an oil discharge interface valve (E1) arranged at the upper part of the transformer oil tank, and the other end of the oil discharge pipeline is led into a pebble of an oil storage pool of the transformer for discharging oil; the leakage checking port (E4) of the oil drain valve is arranged at the position of about 1.5m of the height of the oil drain pipe I (E5); the transformer oil conservator oil discharge pipeline (F) assembly is formed by sequentially connecting a conservator oil discharge pipeline (F1), a conservator oil discharge control valve (F2), an oil discharge pipeline leakage overhaul port (F3) and an oil discharge pipeline II (F4), one end of the transformer oil conservator oil discharge pipeline (F) is led out from a position between a transformer oil conservator and a transformer oil tank connecting pipe, the other end of the transformer oil conservator oil discharge pipeline is directly connected to the position below a transformer oil storage tank pebble, the height of the oil discharge pipeline II (F4) is about 1.5m, and the position of a pipeline interface led out by the transformer oil conservator oil discharge pipeline (F) is positioned between a transformer oil conservator stop valve and a transformer oil conservator bottom valve;

the on-site fire extinguishing control cabinet (G) component consists of a manual starting button (G1), an emergency stopping button (G2) and a dry powder spray nozzle electromagnetic valve control button (G3); the manual starting button (G1) and the emergency stopping button (G2) are used for manually starting and stopping the dry powder-nitrogen injection fire extinguishing combined system in an emergency mode, and the dry powder spray nozzle electromagnetic valve control button (G3) is used for manually starting and stopping the dry powder spray nozzle electromagnetic valve in an emergency mode; the on-site fire extinguishing control cabinet (G) component can also provide power for the electromagnetic valve of the spray head, the matched on-site audible and visual alarm box of fire alarm and the display lamp of the jet indicator lamp.

2. The simultaneous multiple transformer fire pollution-free flash powder-nitrogen injection fire extinguishing combined system according to claim 1, wherein: the optimal pollution-free flash fire extinguishing equipment for single transformer fire of the system is configured by a dose dry powder tank group (A2) +4 small dose dry powder tank group (A3) +2 nitrogen fire extinguishing bottle group (C3) in 2 groups of large dose dry powder tank groups (A1) +2 groups; the configuration scheme of the optimal pollution-free flashover fire extinguishing equipment for 2 transformer fires of the system is that 2 nitrogen fire extinguishing bottle groups (C3) are added on the basis of the configuration scheme of the optimal pollution-free flashover fire extinguishing equipment for single transformer fires; the optimal pollution-free flash fire extinguishing equipment configuration scheme of 3 to a plurality of transformer fires of the system is that 1 is added every time, and 1 group of large-dose dry powder tank groups (A1), 1 group of medium-dose dry powder tank groups (A2), 2 groups of small-dose dry powder tank groups (A3) and 2 nitrogen fire extinguishing bottle groups (C3) are added on the basis of the optimal pollution-free flash fire extinguishing equipment configuration scheme of a single transformer fire.

3. The simultaneous multiple transformer fire pollution-free flash powder-nitrogen injection fire extinguishing combined system as claimed in claim 2, wherein: the 4 groups of small dose dry powder canister groups (A3) may be classified into 2 groups of small dose dry powder canister groups (A3) +2 groups of small dose dry powder canister groups (A3) that are one-half.

4. The simultaneous multiple transformer fire pollution-free flash powder-nitrogen injection fire extinguishing combined system according to claim 1, wherein: the single transformer of the system is used for seriously exploding large-area fire and is at least provided with 1 group of large-dose dry powder tank groups (A1) +1 group of small-dose dry powder tank groups (A2) +2 groups of small-dose dry powder tank groups (A3) +2 nitrogen fire extinguishing bottle groups (C3); the medium-explosion medium-area fire disaster in a single transformer of the system is at least matched with 1 group of medium-dose dry powder tank groups (A2) +2 groups of small-dose dry powder tank groups (A3) +2 nitrogen fire extinguishing bottle groups (C3); a single transformer of the system slightly explodes a small-area fire disaster, and is provided with at least 2 groups of small-dose dry powder tank groups (A3) +2 nitrogen fire extinguishing bottle groups (C3).

5. The simultaneous multiple transformer fire pollution-free flash powder-nitrogen injection fire extinguishing combined system according to claim 1, wherein: the length of the fire extinguishing main pipe (B1) is not more than 80 meters.

6. The simultaneous multiple transformer fire pollution-free flash powder-nitrogen injection fire extinguishing combined system according to claim 1, wherein: the windproof, rainproof and shielding dry powder nozzle (B9) at the top of the oil tank is arranged at the upper part of the outer side of the transformer oil tank within 3m, and the windproof, rainproof and shielding dry powder nozzle (B9) at the bottom of the oil tank is arranged at the two ends of the long side of the transformer oil tank.

7. The simultaneous multiple transformer fire pollution-free flash powder-nitrogen injection fire extinguishing combined system according to claim 1, wherein: the system is provided with an explosion-proof device and an oil blocking and discharging device for explosion of transformers with different appearance structures; the explosion-proof device comprises a side surface and top surface sleeve explosion pipe network explosion-proof device, is arranged between the transformer body and the transformer fire extinguishing system pipe network and is close to one side of the fire extinguishing system pipe network and used for guaranteeing that an explosion component damages the transformer fire extinguishing system pipe network and a spray head after the transformer sleeve is exploded, and the explosion-proof device also comprises a side surface and top surface sleeve lifting seat explosion-proof device which is arranged close to the transformer sleeve lifting seat and used for guaranteeing that a pipeline spray head of the internal and external fire extinguishing system of the transformer is not damaged by the explosion component of the transformer sleeve lifting seat; the oil blocking and discharging device is arranged on the outer side of a pipe network of the fire extinguishing system of the transformer in a clinging manner, the oil blocking device is used for ensuring that the explosion flow of the transformer does not exceed the protection range of the fire extinguishing system, and the oil discharging device is used for rapidly discharging the transformer oil to convert the fire spread outside a large-oil-quantity high-strength oil tank exceeding the protection range of the fire extinguishing system into a fire spread outside a small-range small-oil-quantity low-strength oil tank.